% Arcseconds to radians
const.AS2R =4.848136811095359935899141e-6;

% Pi 
const.DPI =3.141592653589793238462643;

% 2Pi 
const.D2PI =6.283185307179586476925287;

% Degrees to radians 
const.DD2R =1.745329251994329576923691e-2;

% Radians to arcseconds 
const.DR2AS =206264.8062470963551564734;

% Arcseconds to radians 
const.DAS2R =4.848136811095359935899141e-6;

% Seconds of time to radians 
const.DS2R =7.272205216643039903848712e-5;

% Arcseconds in a full circle 
const.TURNAS =1296000.0;

% Milliarcseconds to radians 
const.DMAS2R =const.DAS2R / 1e3;

% Length of tropical year B1900 (days) 
const.DTY =365.242198781;

% Seconds per day. 
const.DAYSEC =86400.0;

% Days per Julian year 
const.DJY =365.25;

% Days per Julian century 
const.DJC =36525.0;

% Days per Julian millennium 
const.DJM =365250.0;

% Reference epoch (J2000.0), Julian Date 
const.DJ00 =2451545.0;

% Julian Date of Modified Julian Date zero 
const.DJM0 =2400000.5;

% Reference epoch (J2000.0), Modified Julian Date 
const.DJM00 =51544.5;

% 1977 Jan 1.0 as MJD 
const.DJM77 =43144.0;

% TT minus TAI (s) 
const.TTMTAI =32.184;

% Astronomical unit [m]; DE405;
const.DAU =149597870691.000015;

% Speed of light (m/s)
const.CMPS = 299792458.0;

% Light time for 1 au (s)
const.AULT = 499.004782;

% Speed of light (AU per day) 
const.DC =const.DAYSEC / 499.004782;

% L_G = 1 - d(TT)/d(TCG) 
const.ELG =6.969290134e-10;

% L_B = 1 - d(TDB)/d(TCB), and TDB (s) at TAI 1977/1/1.0 
const.ELB =1.550519768e-8;
const.TDB0 =-6.55e-5;

% Schwarzschild radius of the Sun (au)
% = 2 * 1.32712440041e20 / (2.99792458e8)^2 / 1.49597870700e11
const.SRS = 1.97412574336e-8;

